(Solved): A mat foundation in the figure below is 45m wide and 90m long. The sum of the applied structura ...

A mat foundation in the figure below is $45\mathrm{m}$ wide and $90\mathrm{m}$ long. The sum of the applied structural loads including the foundation weight is $800\mathrm{MN}$. The mat foundation is placed on the sand layer. The depth of the foundation is $5.0\mathrm{m}$ and the groundwater table level (GWT) is located at $4m$ depth from the ground surface. By using the proper soil strength parameters and considering the position of the groundwater: a. Compute the ultimate and net bearing capacity of the given mat foundation by using the Terzaghi's bearing capacity equation. b. Compute the net bearing pressure considering the groundwater table level. c. Decide if the given mat foundation is safe against bearing capacity.